Abstract
This paper presents an initial evaluation of the seismic demand for diaphragms during a shake table test of a three-story precast concrete structure.Each level of the test structure contained a different precast concrete floor construction technique: topped double tees on the lower level; topped hollow core on the middle floor; and pretopped double tees on the top floor.The diaphragms were designed and detailed according to a new design methodology developed as part of parallel research.The structure was subjected to a series of 16 strong ground motions with increasing intensity including design-basis and maximum considered earthquakes for which the diaphragms were designed.In the paper, the major diaphragm global and local response is quantified.Conclusions are drawn regarding the observed diaphragm behavior.